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Wireless Communications and Mobile Computing
Volume 2018, Article ID 1349702, 7 pages
https://doi.org/10.1155/2018/1349702
Research Article

Time Delay Estimation of AIS Signal Based on Three-Order Cumulant

1School of Electronic Information Engineering, Tianjin University, Tianjin 300072, China
2Maritime College, Tianjin University of Technology, Tianjin 300384, China
3School of Electronic Engineering, Xidian University, Xi’an 710071, China
4School of Electrical and Electronic Engineering, Tianjin University of Technology, Tianjin 300384, China

Correspondence should be addressed to Xin Meng; moc.361@tujt_gnem

Received 24 October 2017; Revised 5 March 2018; Accepted 4 April 2018; Published 10 May 2018

Academic Editor: Paolo Barsocchi

Copyright © 2018 Xin Meng et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A time delay estimation algorithm based on three-order cumulant with the different symmetry of modulation signal between training sequence and information sequence of AIS (Automatic Identification System) is presented, which aims to overcome the large time delay and strong noise in the receiver side of AIS. Theoretical analysis and simulation results show that this algorithm successfully suppresses the influence of Gaussian noise. Moreover, under non-Gaussian and correlative noise, it can also obtain a fine estimated performance. Simulation results show that this algorithm is superior to the correlative and data-aided time delay estimation ones.